DE1671531B1 - Transfer for plastic container - Google Patents

Description

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The invention relates to a transfer for plastic on which it, with its synthetic resin protective film over-

Containers, especially polyethylene bottles, pulled through, solid and resistant to abrasion and

Chemical influences that can be removed from a paper carrier are adhered to by heating.

Layering in the form of a waxy release layer, the invention transferring a synthetic resin protective film by heating, a decal which can be applied thereon, consists of a removable layer of printing ink and an adhesive layer on the backing of a first, on the printing ink layer, which is characterized by the surface This carrier element arranged, is that the release layer consists of a waxy layer that comes off when heated, a free surface of the material with a softening point of about 80 that detaches up to 120 ⁰ C and a penetration of about 1 to 10 layers covering primer and protective layer, on which a wax-free vinyl-acrylic acid train, an imprint (print image), which optionally can be applied with varnish without the risk of migration on the free surface of the protective layer, the synthetic resin protective film Content coating arranged layers can exist, and has a wax-free vinyl acrylic acid varnish and an adhesive layer arranged over the printed image, the adhesive layer consists of a polyamide resin or 15 The sequence of layers is shown in FIG. 1 specified,
this contains. After the transfer, the label according to the invention, which can be transferred with the help of heat, permanently adheres to the surface, which has long been known. It was also applied by heating, and it shows, in contrast to the labels that can be brought up with a paper backing, a well-known heat transferable label that often does not have a transfer layer made of resin or wax and a simple cellophane tape sample printed in printing ink or other color on the stand and not resistant to the in the household before transfer layer are already known. The solvents and detergents used for this are, an applied layer that can be transferred by heating, significantly improved, chemical and mechanical th, as well as the subsequent coatings, the resistance.

again several, mostly different, individual layers 25 only in the decal according to the invention have, but are temporarily present back wall (layer carrier) for various reasons not fully satisfactory, especially if it consists of paper, e.g. B. from the usual Kraft paper Plastic containers are to be applied. or any other type of paper. The paper so For example, an application carrier that is applied by heating does not require any special surface treatment known decal, which only has three layers and no special coating, but can be glued and supposedly to be much cheaper than the tes or coated paper also used known designs. However, it turned out to be.

a three-layer, heat-transferable sticker For the well-known labels based on decals not meeting the requirements of the consumer, mostly untreated paper was used, which was completely fulfilled, especially when it led to less than satisfactory results on plastic, since the containers, such as polyethylene bottles , when the paper is not intended to be used as a label because such labels were glued or not very heavily calendered, the drawing layer is applied easily. Invention chains are intended to mechanical effects, e.g. B. According to, however, the paper carrier does not necessarily have to scratch or abrasion, as well as the effects of the weather and be glued or coated, if the additional exposure to various solvents 40 writing release layers are used, including detergents against as possible proved to be particularly suitable to be constantly, what for those with the known three- is a cheap, machine-smooth kraft paper,
layered decals The layer that causes the heat to detach does not apply, since it often does not even have the simple "cellophane adhesive tape" known to the specialist - a waxy material with a softener - 45 point from about 80 to 120 ⁰ C and one Penetration sample insist on adherence. The known to be from about 1 to 10; It does not have to soften or melt completely when heated for the purpose of labels, compared to the usual ones used in the household, so that the paper carrier is separated from the layer part of the liquid detergents and laundry detergents. Can solve the decal. In addition, the material, regardless of whether it is a mixture or homogeneous, must be able to accept decals for objects made of glass and ceramic without sinking or sinking on paper with a heat-removable one known from the heat transfer coating, in which the material to be applied is absorbed and without wandering image of vitrifiable or ceramic colors or mixing of the coating into or with the protrusion, which takes place after application at high temperature 55 dissolving layer.

to be burned in. The layer which brings about the detachment under heat among the large number of suitable substances consists of a mixture of the various polyethylene glycol compounds described in the literature. In contrast to benen waxes, partially oxidized polyethylene has been used in the decal according to the invention, in which the adhesive layer and the release layer as well as the synthetic 60 preferably of 1400, with a molecular weight of about 1000 to 1800, are retained as a particularly suitable thermosinic protective film the removable layer proved. The partially oxidized transfer picture known from these layers when stoving polyethylene has a penetration hardness of about 2.5 until it has evaporated, and only the "glass picture" remains. 5.5, an acid number of about 10 to 20 and at 125 ^° C. While the known design has a viscosity of about 170 to 210 cP. Certainly only on objects (in particular made of glass and its detaching substances have also proven to be ceramic) that are suitable for burning in the applied. These substances have the advantage that they allow for images, if the peelable, machine-smooth kraft paper according to the invention is not intended exclusively for plastic surfaces, so that this paper is used as a carrier

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can be, and moreover, their formation represents and at the same time prevents the for cost lower than those of the partially oxidized printing ink used during the polyethylene waxes, position of the label migrates into the release layer. The release agents can be any of the following three In addition, the primer gives the label that Belong to classes: 5 they covered after transfer to the new underlay,

1. The release layer can be made of a single, chemical and mechanical resistance, slightly oxidized polyethylene wax of low. The lettering or picture will immediately insist on molecular weight. As an example, ^the Grundierungsuberzug was being developed, a polyethylene wax, the large weight depends a molecu- procedure followed by the type of image of 1400, a softening point of ^{10 The} inks used ^{for this purpose} can, according to 103 ⁰ C, a penetration hardness of 4.0 applied , an acid number of ^the desired image em to six hues around 11.0, a saponification number of only 20 and and the individual colors will generally have a viscosity of 225 cP at 250 ° C. Applied ^{or imprinted in all- 1} JV separate stages, the saponification number can be between 15? ^The printing inks used are the usual, au and 23 lie. Such a wax is cheaper than ^{15 de, r} based on chlorinated rubber resin and / höheroxydierten the waxes and strikes outside £ 5 ^de nitrocellulose. It is preferable not to use it through, nor to use it from the usual ^color , ^nv . ^of two different types that are absorbed in machine-calendered Kraft paper. applying successive layers. When

2. The release layer may also take no Schwiengunoxydierten then occur waxy resin from conventional ²⁰ lead from a Jrmgen and drying, as d _ie for the two colors types are USAGE properties with an indentation hardness of about ^de * ⁿ solvent systems different.

1 to 10 and a softening point of about ^We ™ ^{of the} imprint on the Grundierungsuberzug 80 to 120 ⁰ C, which is applied to the after deposition, it is an adhesive or adhesive-paper support the action of a corona discharge ^sch j ^CHT 8 ⁶ ^. ^{which is made of} ™ polyamide resin. Such waxes are below ²⁵ and are preferably used as a paint solution. The other certain polyethylene waxes (e.g. the adhesive layer is applied in such a way that the one known from it under the trade name "Epolene N") ^covers _c ^e * ^eie } ^ch & ^oß * ^{T lst} _fl ^al * that of the printing and some Fischer-Tropsch waxes (eg bi of. If using the inventive Abziehunter the trade name "FT wax 200" Working Büder em label under transfer of Besc ^ rect knew), or is montan wax, ³ ° ^du f ^h pan influence on a plastic container on ouricury wax, steron wax, carnauba wax, f ^brac , ^{ht be} '* ° ^brm ? \ Λ, ^ "ttt ^with certain paraffin waxes, certain microcrystalline ₊ ^{contact with the} surface of the container. The over-waxes etc. are then effected by using

3. The release layer may further comprise a mixture DAR heat and pressure from the back of Beschichstellen from Äthylenvinylacetat- (EVA) -mischpoly- ³⁵ tungstragers forth. The devices for carrying out merisat (eg »Elvax resin«) and paraffin wax. The mixture preferably consists of 70% pa. ^oak Y ⁰ " ^emem simple electric iron raffln and 30% ethylene-vinyl acetate mixed ^{polybls to} " ^very complicated apparatus only demand and merisat (EVA) but the copolymer can adjusting means Flaschenbehaltern etc .; many need 20 to 40% of the mixture represent. encryption ⁴ ° ^artl S ^he devices are known and by Paschi Edene grades of EVA are effectively protected without tent.

Consideration of their melt index and their mol- _T ^{If au} . ^{f the mcbt} coated side of the removable weight. The preferred paraffin wax is heat and pressure applied to the carrier

one with a melting point of about 66 adhesive layer against the plastic container

up to 69 ° C ^{45 presses} ₅ melts or softens when heated

removable layer, and that of the container surface

The heat release layer is preferably on top of the adhesive layer that connects to it. To

Backing paper in an amount of about 8.5 to 11.9, the paper backing is then removed for a short time, so that

preferably 10.2 g / m ² applied. So if the adhesive layer, the print, the protective cover

the backing paper from a supercalendered natural 5 ° and part of the heat release layer firmly attached to the

borrowed 13.6 kg Kraft paper about a thickness of plastic containers adhere, as shown in FIG. 2 her-

0.056 mm, the thickness is the heat going on.

Release layer at about 0.016 mm or about one It was found that when transferred usually

Quarter of the paper thickness. about 50% of the heat-releasable layer from the paper

The paper carrier with the carrier applied to it can be detached.

The release layer is then imprinted with the application of heat on the back

The primer and protective layer coated on the paper backing has two effects:

a wax-free vinyl acrylic acid varnish or varnish. First, the wax coating begins to melt and

consists. Such a material can easily be detached from the paper support; second begins

print on the release layer and also forms 60 the adhesive layer to soften and is thermo-

a good reason to print the on it - plastically. If the carrier then from the coating

following typeface. is peeled off, the adhesive layer bonds firmly with

The primer and protective coating can be applied to the surface to be labeled. Release layer can be applied with the help of the deep After applying the applied printing process, preferably in such a way that 65 labels made up of four layers, as shown in FIG. 2 stand out printed area is larger than that of the going. The adhesive layer that was previously the outermost following imprint. Insofar as the protective layer has shown (see Fig. 1), it is now the lowest two functions as it is a basis for the writing- layer through which the label adheres to the surface

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• the container sticks. Immediately above this, in this case, is very heavily calendered, natural-colored, then the decorative print layer. Over this on- Kraft paper; The partially oxidized polyethylene of print or picture is used as protection against the low molecular weight that mixes for the release layer and mechanical attacks. The layer that was previously used had a molecular weight from the primer (see Fig. 1 ) represents. The encryption 5 is about 1400, a softening point (ring and ball) failure portion of the release layer now of about 102 ⁰ C, a penetration hardness of about 4.4, the uppermost layer and contributes to increase the resistance has an acid number of about 14 and a viscosity of about 19OcP at 125 ° C. against chemical and mechanical influences. The print consisted of at. successively applied layers of six different

The following examples illustrate the invention in different colors.

closer: Decals of the type above can be applied to very

Example 1 print and transfer satisfactorily. the

Labels made with it adhere extremely well

The rear layer support consisted of a fixed to the plastic and are against both mecha-white, Machine-smooth Kraft paper No. 30 (extremely resistant to abrasion and chemicals Thilmany Paper Company). The paper became stable, coated with a waxy, partially oxidized example 3

Polyethylene (trade mark "Epolene E-14", manufacturer Eastman Chemical Products) with a molecular weight of about 1400 used in Example 1, a softening point of 20, white Kraft paper served as the layer support; It was coated with a of 10 ° C, a penetration hardness of about 3.5 and a slightly oxidized (saponification number about 20), wax acid number of about 14. The coating was on the like polyethylene with a molecular weight of backing paper in an amount of 17 g / cm ^{2 brought to} about 1400, a softening point of 103 ° C, one. Penetration hardness of about 4.0, an acid number of about The thus pretreated substrate was then in 25 11 and a viscosity of 225 cP at 25O ⁰ C. The printing process coated with a protective layer, the amount of coating on the substrate paper entwozu a conventional screened roller used became. As if speaking 2.7 kg per ream.

The coating material was a wax-free vinyl acrylic. The coated paper backing was then analogous

Acid varnish. Example 1 with the first protective coating from a

The wax-free vinyl acrylic acid varnish (trademark Imprint applied, including, for example, red and "98-E 2053 b", manufacturer Fredrick H. Levey, Co., Inc.) blue parallel printing ink (manufacturer Hercules Powder printed.

Company), a printing ink based on the vinyl acrylic acid layer was printing chlorinated Rubber resin, can be used. imprinted with alternating layers of Over this imprint, again under 35 printing inks of type "C" (nitrocellulose) and des Application of a printing process, as the third over-type »D« (polyamide) are used, Zug an adhesive or adhesive layer applied, which from As an adhesive layer was applied over the print image

a solution of a thermoplastic amide resin in a solution of a thermoplastic polyamide resin in Form of a varnish existed. Paint form applied.

The decal prepared as above was then 40. The decal prepared above was then used a poly is applied with the layer down on a polyethylene bottle in the manner described in example 1, the surface of which is labeled pre-ethylene bottle in the usual way. Checking the label had been treated to make them receptive to what went just as favorably as examining the label To make printing. (The pretreatment can be done, for example, in contact with a flame or in the case of example 4

loading in a treatment with a spray discharge

). Heat was then applied to the paper base. The procedure was as in Example 3, but with the following

and pressure applied, the adhesive layer firmly against lowing differences: The release layer consisted of the polyethylene was pressed. Due to the heat up a unoxydierten polyethylene wax with a Momung the polyethylene layer in sufficient softened lekulargewicht 50 of about 1400, a Erweichungsdem extent, so that the paper backing easily peeled off point (ring and ball) of about 102 ⁰ C, a Einwerden could. At the same time, the adhesive hardness of around 4.4 and a viscosity of around a layer were firmly bonded to the polyethylene surface of the Be 19OcP at 125 ° C. Immediately after applying the release container. Together with the paper backing, the coated backing paper was peeled off from under about half of the peeling layer, which, passed through a spray discharge device, remained stuck; the other half remained on the one around the wax with a label for further coating. to provide a receptive surface.

After cooling, the labeled jars were The decals so produced were found to be

studied to print the adhesion of the applied particularly easily, and their transfer Check labels. It turned out that the invention on the vessels was also very good. The resulting Labels firmly adhered to the container wall and the labels had the same or even better ones both against mechanical stress, such as Ab- properties such as those after the previous operation, as well as against chemical effects.

are stable. ". . ,,.

₆ Example5

It was again worked according to Example 3, wherein

The procedure was as in Example 1, but with the release layer made of a mixture of 70% the following differences: The backing paper was in paraffin wax with a melting point of 66 to

And 30 ° / ₀ EVA copolymer (manufacturer duPont trademark "Elvax400") was 9O ⁰ C (5512 "commercial product of Sun Oil Co., labeled" Grade). The properties of the decals produced in this way corresponded to those obtained according to the above examples.

Claims (5)

Patent claims: 1. Decal for plastic containers, in particular polyethylene bottles, with a coating removable by heating from a paper carrier in the form of a waxy release layer, a synthetic resin protective film, an applied printing ink layer and an adhesive layer over the printing ink layer, characterized in that the release layer is made of a waxy material with a softening point of about 80 to 120 ^° C. and a penetration of about 1 to 10, to which a wax-free vinyl-acrylic acid varnish can be applied without the risk of migration, and the synthetic resin protective film contains a wax-free one Has vinyl acrylic acid varnish and the adhesive layer consists of or contains a polyamide resin. 2. transfer according to claim 1, characterized in that the release layer is a partially oxidized Polyethylene resin having a molecular weight of about 1,000 to 1,800, a softening point from about 2.5 to 5.5, an acid number from about 10 to 20 and a viscosity from 170 to 21OcP 125 ° C. 3. Transfer according to claim 1, characterized in that the release layer consists of an unoxidized Wax or waxy resin is made after application to the substrate of the Has been exposed to the action of a spray discharge. 4. transfer according to claim 1, characterized in that the release layer consists of a mixture from 60 to 80 percent by weight paraffin and 20 to 40 percent by weight of an ethylene-vinyl acetate copolymer consists. 5. A transfer according to claim 4, characterized in that that contained in the release layer Paraffin has a melting point of 66 to 69 ° C. For this 1 sheet of drawings Copy 109 528/83